Air preheater



2 Sheets-Sheet 1 H. KARLSSON ET AL AIR PREHEATER Filed Jan. 22, 1937 Dec. 19, 1939.

INVENTOR MK L RR Mk R Dec.-l9, 1939. I KARLSSQN 5 L 2,183,936

km IfREI-IEATER Filed Jan. 22, 1937 2 Sheets-Sheet? fi/L ER AJRLSSOM BY MLL/AM 0. yERR/CK,

I ,iL ATTORNEY Patented Dec. 19, 1939 M83336 UNITED STATES PATENT ori ice AIR PREHEATER Hilmer Karlsson and William D. Yerrick, Wellsville, N. Y., assignors to The Air Preheater Corporation, New York, N.Y.

Application January 22, 1937, Serial No; 121,830

3 Claims. (01. 257-6) The present invention relates to air preheaters through the channels in the regenerative masses of the type usually referred to as regenerative, into a chamber above the rotor and thence to the in which masses of heat absorbent material are stack or other point of disposal. The gases to be mounted rotatably in such manner that they are heated are delivered by suitable connections to alternately introduced into, and made a part of, a chamber above the rotor whence they ow a passage through which hot gases flow and. a through the regenerative masses to a chamber passage through which gases to be heated flow. below the rotor and thence to the desired point. These structures are well known and shown in a The two chambers above the rotor are sep ted number of prior patents such for example as from each other by suitable partitions (not p- 10 Patent 1,606,306 granted on November 9, 1926, pearing in the drawings) and similarly the two 10 to Ljungstrom. chambers below the rotor are out of communi- One of the gases, particularly the heating gas, cation with each other. All of this is in accordis frequently charged with more or less solids, ahee With Ordinary Practice nd u d rstoo as for example soot in the case of gases coming by those conversant with this art. The patent from boiler and other furnaces, or dust in the e err d to ab illustrates it y- 15 case of gases coming from smelters, kilns of varin pr i 0111 ihVeIltiOh, the Shaft instead ous kinds, etc. As a result, the small passages in f being v r i l as in n ry practice, i inthe regenerative mass through which the gases clined from the vertical as clearly shown n have to flow become clogged. Various means e a o of inelinatieh will y in D have in the past been suggested for removing title, t fi d e s y be'teiken to be a suit- 20 such dust, soot, ashes, etc. and while some of ab e ethem are of practical benefit, there is room for On ac o of s t t position Of-the S a t improvement and. the present invention provides 3 there will be a side thrust which is taken up means for such removal which will be thoroughly in the be 31- li b and inexpensive, The plates H3 in each compartment do not in 25 The invention is illustrated in the accompany 0111 arrangement fi e Co p p ing drawings which represent one form of equi 1y s in r in ry p i t ar so r n s ment utilizin the invention. Fig, 1 of th to leave a certain amount of clearance between drawings is a lateral elevation of the installathe gro p a d the Partitions l7 and the d tion, the preheater proper being shown in vertiwalls [9. This clearance appears at 33 at the 30 cal central section on line Il of Fig. 2, and top of the group. At the bottom the clearance is Fig. 2 is a sectional view on line 2 2 of Fig.1. p f r bly eq ly iv between the w sides The heater, driving mechanism, etc. are in f th ro p, a d t space between the group of general very closely similar to those of devices plates and the partition I1 is in each case closed 35 of this sort as used heretofore and may be briefly by a plate 35. This leaves the plates free to 35 I described as follows: The rotor l is mounted on swing about their lower edg thr an are a shaft 3, the latter being driven by a motor 5 qu l o the l r nce, h swinging being us d through reduction gear 7 and gearing 9. The by gravity as the rotor revolves. The group of shaft 3, together with the rotor i, is supported p ates at the e right o the W fi es is on the bearing H. The regenerative material is tilted to the right and the plates will remain in 40 shown in the present instance as of a'usual form s pos il they come around in their roand comprises groups l3 of plates each contained tation in the direction indicated by the arrow to in a compartment. These compartments are a point toward thle extreme left as viewed in the formed by radially extending partitions iiidrawi s, 1-. fi the highest 13011115 through 45 dividing the space within the rotor into sectors Which theymove. At a position near this highest 45 and end walls 59-58, and intermediate partipoint they will tilt over toward the right and tions i7--il' subdividing the sectors into a numassume the position shown in the bundles at the ber of compartments, the number depending left in the figures. They will keep this position upon the size of the entire structure. The plates until in the rotation of the rotor they approach I 13 are preferably and in accordance with prior the lower position toward the right as shown in 51) practice alternately plain and corrugated in such the figures, when they will again tip toward the a manner as to present passages for gases exright andassume the position shown for the tending through the group from top to bottom. groups at the right of the figure. This tipping The heating gases are delivered by suitable c0nof the plates results not only in a jar but also 55 nections into a chamber below the rotor and flow in a slight frictional movement of the plates over 55 to each other, both of which will result in dislodging any solid particles such as ashes, soot, dust, etc., which particles will then be carried upward or downward, as the case may be, by the gas current flowing through the mass.

While in the specific form described above the plates are shown and described as in a position tangential to the circles in which they rotate, it will be clear that the invention is not confined to a structure with the plates in this particular position. They might be arranged radialv ly or at some other angle. Other variations may be made in practice Without departing from the spirit of the invention.

What we claim is:

1. In apparatus of the class described, the combination of a rotor frame, means to rotate the frame about an axis inclined away from the vertical, groups of generally upright plates with some play at the top in a direction at right angles to the plates, whereby during a complete revolution of the frame the plates of each group swing about their lower edges taking up said play first in one direction and then in the other, particles of dust, etc., on the plates thereby being dislodged.

2. In apparatus of the class described, the

combination of a rotor frame, means to rotate the frame about an axis inclined away from the vertical, groups of generally upright plates with some play at the top in a direction at right angles to the plates, the plates lying generally tangential to the circles in which they rotate, Whereby during a complete revolution of i the frame the plates of each group swing about their lower edges taking up said play first in a direction to- Ward the axis and then in a direction away from the axis, particles of dust, etc., on the plates thereby being dislodged.

3. In apparatus of the class described, the combination of a generally cylindrical rotor frame with its axis inclined away from the vertical, means to rotate the frame about its axis, means dividing the space within the frame into compartments tWo Walls of each compartment extending radially from said axis, a group of generally upright plates in each compartment with clearance at the top in a radial direction, whereby during a complete revolution of the frame each group will take up the clearance first in one radial direction and then in the other, and particles of dust, etc., on the plates will be dislodged.

I-IILMER KARLSSON. WILLIAM D. YERRICK. 

